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condenser insert set
Posted: Sun Aug 23, 2020 10:11 am
by iconoclastica
Has anyone tried one of these
https://www.ebay.co.uk/sch/bauras/m.htm ... 7675.l2562 ?
I have always read these modifiers ought to sit near the diapragm, but in this contraption they are much lower. Isn't the position perhaps that important?
Re: condenser insert set
Posted: Sun Aug 23, 2020 11:29 am
by deBult
These are INSERTS into the condenser and close to the diaphragm. Iām pretty please with my set.
Re: condenser insert set
Posted: Sun Aug 23, 2020 12:24 pm
by iconoclastica
deBult wrote: āSun Aug 23, 2020 11:29 am
These are INSERTS into the condenser and close to the diaphragm. Iām pretty please with my set.
What type of condenser are you using? On my 0.90 achromat the diaphragm resides c. 30mm above the bottom plate.
Re: condenser insert set
Posted: Sun Aug 23, 2020 9:17 pm
by KD Arvidsson
Hi! I love my insert
I have mine on a common abbe 1.25 on a Labophot 2 and i am very pleased
//KD
Re: condenser insert set
Posted: Mon Aug 24, 2020 7:26 pm
by deBult
iconoclastica wrote: āSun Aug 23, 2020 12:24 pm
deBult wrote: āSun Aug 23, 2020 11:29 am
These are INSERTS into the condenser and close to the diaphragm. Iām pretty please with my set.
What type of condenser are you using? On my 0.90 achromat the diaphragm resides c. 30mm above the bottom plate.
Olympus BH2 with standard Abbe condenser or Phase condenser.
Re: condenser insert set
Posted: Tue Aug 25, 2020 2:42 am
by Saul
iconoclastica wrote: āSun Aug 23, 2020 10:11 am
...
I have always read these modifiers ought to sit near the diapragm, but in this contraption they are much lower. Isn't the position perhaps that important?
...
On my 0.90 achromat the diaphragm resides c. 30mm above the bottom plate.
Nikon Achr 0.90 is not the best candidate to use with DF inserts, because of the internal design (I fixed your drawing a little bit). Internal "opening" (green) does not allow to go closer to the aperture .
Of course, for the DIY purpose, opening could be widened, but it is kind a aggressive measure. It is doable, but not sure how many user are ready to make this kind of surgery on the own condenser. Abbe 1.25 are pretty cheap
- condensator schematisch.jpg (44.06 KiB) Viewed 6639 times
Re: condenser insert set
Posted: Tue Aug 25, 2020 7:32 pm
by Crusty
I bought a set for an Olympus BH2 from the same guy and I'm quite happy.
Re: condenser insert set
Posted: Tue Aug 25, 2020 8:38 pm
by iconoclastica
Saul wrote: āTue Aug 25, 2020 2:42 am
Nikon Achr 0.90 is not the best candidate to use with DF inserts, because of the internal design (I fixed your drawing a little bit). Internal "opening" (green) does not allow to go closer to the aperture .
Of course, for the DIY purpose, opening could be widened, but it is kind a aggressive measure. It is doable, but not sure how many user are ready to make this kind of surgery on the own condenser. Abbe 1.25 are pretty cheap
That explains it. Also, I gather there are two different models of the achr 0.90 about, for my drawing was exact too (at least on the outside).
I will look for another condenser for this purpose, that seems to be the best way to go indeed.
thanks,
Wim
Re: condenser insert set
Posted: Wed Aug 26, 2020 3:18 am
by Saul
iconoclastica wrote: āTue Aug 25, 2020 8:38 pm
...I gather there are two different models of the achr 0.90 about, for my drawing was exact too (at least on the outside)...
Design is based on this model:
- IMG_1766.JPG (107.13 KiB) Viewed 6603 times
Re: condenser insert set
Posted: Wed Aug 26, 2020 8:14 pm
by iconoclastica
Mine:
- c1.jpg (137.8 KiB) Viewed 6586 times
- c2.jpg (101.32 KiB) Viewed 6586 times
Re: condenser insert set
Posted: Wed Aug 26, 2020 9:26 pm
by Saul
Hmm, depth looks different (or just perspective ? ), mine is 14mm ....
Re: condenser insert set
Posted: Thu Aug 27, 2020 2:38 pm
by iconoclastica
It is real, not the perspective. Mine is between 7 and 7.5mm deep:
[attach]c3.jpg[/attach]
Re: condenser insert set
Posted: Thu Aug 27, 2020 4:16 pm
by Saul
iconoclastica wrote: āThu Aug 27, 2020 2:38 pm
It is real, not the perspective. Mine is between 7 and 7.5mm deep
Thanks Wim, useful information !